Evolution and Main Controlling Factors of Reefin the Southern Deepwater of Qiongdongnan Basin

TANG Wu，WANG Ying-min，YANG Cai-hong，ZHANG Lei，ZHONG Mi-hong，ZHU Guo-long，LI Dong

doi:10.11764/j.issn.1672-1926.2013.05.965

Natural Gas Geoscience >

2013 , Vol. 24 >Issue 5: 965 - 974

DOI: https://doi.org/10.11764/j.issn.1672-1926.2013.05.965

Evolution and Main Controlling Factors of Reefin the Southern Deepwater of Qiongdongnan Basin

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1.College of Geosciences,China University of Petroleum,Beijing 102249,China;
2.State Key Laboratary of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China;
3.Institute of Shanghai Offshore Petroleum Branch,SINOPEC,Shanghai 200120,China；
4.PetroChina Coalbed Methane Company Limited,Beijing 100028,China;
5.Research & Development Center of CNOOC Gas & Power Group,Beijing 100027,China;
6.Headquarters of Hailar Petroleum Exploration and Development of Daqing Oilfield Company Ltd.,Daqing 163000,China; 7.Research Center of CNOOC,Beijing 100027,China

Received date: 2013-01-28

Revised date: 2013-05-30

Online published: 2013-10-10

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Abstract

In order to direct the petroleum exploration in the southern deepwater area of Qiongdongnan Basin,based on high resolution 3D seismic data,the identification,evolution and main controlling factors of reef in the southern deepwater area of Qiongdongnan Basin were studied.The results show that the seismic features of the reef in this area are mounded reflections,with high amplitude reflections in the bottom and top,but chaotic internal reflections.In local area,it shows symmetrical reflections or onlap reflections on the overlying strata.The seismic reflection characteristics are similar to the reef seismic reflection of LH11-1 Oilfield.Simultaneously,the reef mainly distributes in the margin or the inner high parts of northeastern carbonate platform.Vertically,the reef has experienced the process of exposing-growing-drowning several times,which is determined by the relative sea level changes.The dropping of the relative sea level causes the accretion of reef towards the sea and the leaching of the earlier reef.While,the rise of the relative sea level leads to the reef migrate toward the structure highs.Additionally,tectonic movement,terrestrial material supply,paleogeography and paleoclimate also influence the development of reef.

Key words： Reef; Evolution; Main controlling factors; Qiongdongnan Basin

Cite this article

TANG Wu，WANG Ying-min，YANG Cai-hong，ZHANG Lei，ZHONG Mi-hong，ZHU Guo-long，LI Dong . Evolution and Main Controlling Factors of Reefin the Southern Deepwater of Qiongdongnan Basin[J]. Natural Gas Geoscience, 2013 , 24(5) : 965 -974 . DOI: 10.11764/j.issn.1672-1926.2013.05.965

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